JP3664463B2 - Esophageal catheter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a catheter for insertion into the esophagus for use in securing the airway of a patient who has no or weak spontaneous breathing.
[0002]
[Prior art]
For patients who have no or weak spontaneous breathing, a means of inserting a tube into the airway and sending fresh air (oxygen) into the lungs is used, but this practice is only allowed by a physician. It was not possible at the site of the accident. Recently, a life-saving paramedic system was established, and the treatment that could only be provided by first-aid treatments by firefighters so far can now be carried out to some extent by paramedics at the scene, and life can be expected to be maintained. . However, paramedics are not allowed to insert a catheter into the trachea. To secure the airway, air is supplied from outside by inserting the catheter into the esophagus and closing the esophagus with a balloon. I try to go to the side. As such an esophageal insertion catheter inserted into the esophagus, a so-called double lumen type catheter having two lumens has been conventionally known.
[0003]
[Problems to be solved by the invention]
However, the conventional catheter for insertion into the esophagus is a double lumen type, and since the distal end of the catheter body is open, it is possible to secure the airway even if it is inserted into either the esophagus or trachea, but in the case of an emergency The operation was complicated and it took a long time to insert. In addition, the tip opening of the catheter has a sharp shape that is just cut diagonally like other endotracheal tubes, etc., so if a paramedic unfamiliar with insertion performs it, the esophagus, trachea, larynx There are many accidents such as injuries, etc., or accidental insertion into the trachea instead of the esophagus. In severe cases, the esophagus and trachea are perforated, resulting in death.
[0004]
Accordingly, the present invention provides a catheter for insertion into the esophagus that solves the conventional problems as described above, is easy to operate and can be quickly inserted into the esophagus, and is easy to insert, and the insertion is reliable. For the purpose.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is provided with a gastric tube (39) having a diameter smaller than that of the catheter body (31) via a partition wall on the side of the tubular catheter body (31) slightly curved on one side. ,
The gastric tube (39) protrudes from the closed tip (42 ) of the catheter body (31) by a length (L2) of 20 to 30 cm, and the gastric tube (39) has an open tip (43) at the tip. Formed,
An esophageal closing balloon (32) is provided in the gastric tube (39) between the open tip (43) of the gastric tube (39) and the closed tip (42) of the catheter body (31);
A side hole for ventilation (40) is provided in communication with the lumen (41) behind the closed tip (42) of the catheter body (31),
An esophageal insertion catheter (31A) provided with a nasopharyngeal closing balloon (33) behind the side hole (40 ) is provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 is a schematic view of an esophageal insertion catheter 31A according to the present invention, FIG. 2 is a sectional view taken along line BB in FIG. 1, FIG. 3 is an enlarged view of C in FIG. .
The catheter 31A for insertion into the esophagus has a length L1 of 15 cm to 25 cm, preferably about 20 cm. The catheter main body 31 (the whole is formed of a flexible silicone rubber or the like and is formed in a tube shape) via a partition wall on the side of the catheter main body 31A A gastric tube 39 having a diameter smaller than 31 is also provided. The gastric tube 39 protrudes further by a length L2 of 20 cm to 30 cm, preferably about 25 cm, from the closing tip 42 of the catheter body 31.
Since the stomach tube 39 is thin and long, it can be easily and quickly inserted into the stomach without damaging the stomach wall. The distal end of the gastric tube 39 is opened, and the gastric juice can be discharged from the distal opening 43 or an object can be injected into the stomach.
The distal end of the catheter body 31 is closed, and a side hole 40 that communicates with the lumen 41 of the catheter body 31 is formed in the side portion of the front portion.
In the catheter body 31, an esophageal closure balloon 32 having an inner diameter of about 8 mm and a length of about 2 cm and a capacity of about 50 cc is disposed at a position about 10 cm from the distal end of the gastric tube 39. The nasopharyngeal closing balloon 33 having a length of about 3 cm is arranged at the position.
A balloon inflation lumen 37 is formed on the side of the lumen 41 of the catheter body 31 via a septum, and a balloon inflation lumen 35 is formed on the side of the lumen 41A of the gastric tube tube 39 via the septum. ing. The balloon inflation lumen 35 communicates with the branch tube 38 and the balloon inflation lumen 37 communicates with the branch tube 36.
The cross section of the catheter 31 is preferably a shape close to a circle (ellipse) as shown in FIG. 2 (so as not to cause resistance during insertion). Moreover, it is preferable to make the cross-sectional area of the lumen 41 as large as possible so that ventilation resistance does not occur.
[0007]
In order to insert the catheter 31A for insertion into the esophagus into the esophagus, the tongue and lower jaw of the patient lying on one hand are lifted, and the catheter 31A with the other hand is placed on the outside of the catheter body 31 on the curved side. Insert quickly from the tip side. At the time of this insertion, since the gastric tube 39 is formed to be thin and long, it can be easily and quickly inserted into the stomach without damaging the stomach wall.
And if it inserts to a predetermined position, a syringe will be connected to the branch tube 38, air will be sent to the lumen 37, the balloon 33 will be inflated, and the nasopharynx will be closed. A syringe is connected to the branch tube 36 to send air to the lumen 35 to inflate the balloon 32 and close the esophagus. As a result, the catheter is fixed as shown.
Thereafter, a ventilation bag is connected to the rear end opening of the catheter body 31, and air is alternately compressed and expanded by hand like a figo, so that air is passed from the lumen 41 of the catheter body 31 through the side hole 40 to the trachea side. And ventilate. At this time, the expansion of the balloon 32 closes the esophagus, preventing air from leaking in the direction of the stomach and intestines, and the expansion of the balloon 33 closes the nasopharynx, preventing air from leaking to the mouth and outside. The Thus, the patient's airway is reliably ensured.
The distal end of the gastric tube 39 is inserted into the stomach to discharge gastric juice and inject an object into the stomach.
[0008]
[Effects of the invention]
Since the present invention forms a thin and long stomach tube 39, it can be inserted into the stomach without damaging the esophagus and stomach wall. The insertion route can be a nasal route, and the insertion method is the same as that of a normal gastric tube, and can be inserted by a doctor or a lifesaving first aid technician. Unlike the combination tube, since the catheter body 31 does not enter the organ or esophagus, it is considered that there is no fatal complication. In addition, it is easy to discharge gastric juice and inject a substance into the stomach from the opening of the gastric tube tube tip.
[Brief description of the drawings]
FIG. 1 is a schematic view of a catheter for insertion into the esophagus of the present invention. FIG. 2 is a cross-sectional view taken along line BB in FIG. 1. FIG. 3 is an enlarged view of C in FIG. Description】
31A Catheter 31 Catheter body 32 Esophageal closure balloon 33 Nasopharyngeal closure balloon 35, 37 Balloon inflation lumen 36, 38 Branch tube 40 Side hole 41, 41A Lumen 39 Gastric tube 42 Closure tip 43 Open tip

Claims (1)

A gastric tube (39) having a diameter smaller than that of the catheter body (31) is provided along the side wall of the tubular catheter body (31) slightly curved on one side,
The gastric tube (39) protrudes from the closed tip (42 ) of the catheter body (31) by a length (L2) of 20 to 30 cm, and the gastric tube (39) has an open tip (43) at the tip. Formed,
An esophageal closing balloon (32) is provided in the gastric tube (39) between the open tip (43) of the gastric tube (39) and the closed tip (42) of the catheter body (31);
A side hole for ventilation (40) is provided in communication with the lumen (41) behind the closed tip (42) of the catheter body (31),
An esophageal insertion catheter (31A), wherein a nasopharyngeal closing balloon (33) is provided behind the side hole (40 ) .

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